71901 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71901 CEGA/P4A Bearing Product Overview & Core Advantages
The 71901 CEGA/P4A is a single-row angular contact ball bearing manufactured to ultra-precision P4A tolerance class. Engineered for applications demanding exceptional rotational accuracy and high-speed performance, this bearing is universally matchable (SU designation), allowing for precise preload control when mounted in pairs. Its 15° contact angle is optimized to support significant combined loads—handling both radial and axial forces simultaneously. The phenolic resin cage and high-grade chrome steel construction contribute to its high rigidity and stable operation at limiting speeds up to 165,000 rpm.
71901 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing designation indicating a high-precision angular contact bearing series with 12mm bore, 24mm OD, and 6mm width |
| CE | Contact angle designation (15°) optimized for high-speed applications |
| GA | Preload specification indicating Extra light preload / Class A for minimal friction and heat generation |
| P4A | Ultra-precision tolerance class exceeding ABEC 7 standards, ensuring exceptional running accuracy |
71901 CEGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and minimal vibration.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and reduced friction, enabling stable operation at limiting speeds of 165,000 rpm.
Optimized Load Capacity: With a 15° contact angle and 12 precision balls of 3.175mm diameter, this bearing delivers superior combined load capacity (486 lbf dynamic, 198 lbf static).
Universal Matching Design: As a Universal Matchable (SU) bearing, it can be precisely paired to achieve optimal preload and stiffness in duplex arrangements.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71901 CEGA/P4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles: Precision machining centers and grinding spindles requiring exceptional rotational accuracy
- Precision Instrumentation: Medical devices, optical equipment, and measuring instruments demanding minimal runout
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
- High-Frequency Spindles: PCB drilling machines and small-diameter milling applications
